Bidwell Coal Member

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Lithostratigraphy: Kewanee Group >>Spoon Formation >>Bidwell Coal Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Desmoinesian Series
Allostratigraphy: Absaroka Sequence

Primary source

Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.

Contributing author(s)

M. E. Hopkins and J. A. Simon

Name

Original description

The Bidwell Coal Member of the Spoon Formation (Kosanke et al., 1960, p. 32, 65).

Derivation

Named for Bidwell School in Johnson County.

Other names

History/background

Type section

Type location

The type locality is near Bidwell School (NE SE SW 5, 11S-4E).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

Extent and thickness

The Bidwell Coal, although discontinuous, is more widespread than most of the coals in the lower part of the Spoon Formation in southern Illinois and is 4 feet thick in places, although generally thinner. It has been identified in only a few drill holes north of the outcrop belt. The Bidwell has not been recognized in western Illinois.

Lithology

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

Environments of deposition

Economic importance

Remarks

References

KOSANKE, R. M., J. A. SIMON, H. R. WANLESS, and H. B. WILLMAN, 1960, Classification of the Pennsylvanian strata of Illinois: Illinois State Geological Survey Report of Investigations 214, 84 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
3438
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